Now we have
vmlinux ===> VO or kernel, that is output/init_size in misc.c
arch/x86/boot/compressed/vmlinux.bin.xz ==> compressed kernel. that
is input/input_len in misc.c
arch/x86/boot/compressed/vmllinux ==> ZO,
arch/x86/boot/setup + ZO is bzImage.

I really think we should not use
"compressed kernel" for arch/x86/boot/compressed/vmlinux
that should stand for compressed vmlinux.